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Short-term stable isotopic composition variations of near-surface atmospheric water vapor in four semiarid areas (Binxian, Guyuan, Wujiachuan, Yuzhong) in interior northwestern China
Xing, Meng1; Liu, Weiguo1,2
2016-09-01
发表期刊ENVIRONMENTAL EARTH SCIENCES
卷号75期号:18
文章类型Article
摘要This study used an in situ method to monitor short-term atmospheric water vapor concentrations and stable isotopic composition (delta O-18(v) and delta D-v) variations at four sites in semiarid areas of northwestern China during 2014. On a spatial scale, we distinguish a south-to-north difference in atmospheric water vapor concentration. The spatial patterns of water vapor lines (WVLs) may be associated with regional setting. Smaller slopes of WVLs in Guyuan and Yuzhong may reflect dew evaporation, and a steeper slope of WVL in Wujiachuan may be representative of atmospheric water vapor isotopic composition in equilibrium with that of precipitation. On a temporal scale, delta O-18(v), delta D-v, and d(v) exhibited variable patterns, indicating various influences of entrainment, local evapotranspiration (ET), and dew evaporation. A deceasing trend of atmospheric water vapor delta O-18(v) and delta D-v in Wujiachuan indicates that the entrainment effect surpassed that of evaporation; an increasing trend in Guyuan and Yuzhong may be attributed to the effect of evaporation surpassing that of entrainment. Based on a precipitation event at Guyuan, the lateral air mass transported from Wujiachuan may be the reason for rapid recovery of atmospheric vapor isotopic composition to the baseline value and a looping pattern between atmospheric water vapor mixing ratio (w) and delta O-18(v) observed at Guyuan. Linear correlation coefficients of delta O-18(v) with w varied from 0.02 to 0.88 at four study sites. Location differences may be the reason for the capability of w to explain why the variability of atmospheric water vapor isotopic composition was greater at Wujiachuan than at Binxian. Dew evaporation after the precipitation event may be the major reason for eliminating the relationship between w and delta O-18(v) at Guyuan and Yuzhong. Although synoptic conditions were similar at the four sites, dv variations may be controlled by ET, entrainment, and dew formation at different sites and times.
关键词Atmospheric Water Vapor Stable Isotopes Deuterium Excess Water Cycle
WOS标题词Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1007/s12665-016-6085-4
关键词[WOS]DEUTERIUM EXCESS ; TIBETAN PLATEAU ; PRECIPITATION ; DELTA-O-18 ; MOISTURE ; RATIOS ; CALIBRATION ; EVAPORATION ; DELTA-H-2 ; REVEAL
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology ; Geology ; Water Resources
WOS类目Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号WOS:000384333000039
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5682
专题加速器质谱中心
作者单位1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
2.Xi An Jiao Tong Univ, Sch Human Settlement & Civil Engn, Xian 710049, Peoples R China
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GB/T 7714
Xing, Meng,Liu, Weiguo. Short-term stable isotopic composition variations of near-surface atmospheric water vapor in four semiarid areas (Binxian, Guyuan, Wujiachuan, Yuzhong) in interior northwestern China[J]. ENVIRONMENTAL EARTH SCIENCES,2016,75(18).
APA Xing, Meng,&Liu, Weiguo.(2016).Short-term stable isotopic composition variations of near-surface atmospheric water vapor in four semiarid areas (Binxian, Guyuan, Wujiachuan, Yuzhong) in interior northwestern China.ENVIRONMENTAL EARTH SCIENCES,75(18).
MLA Xing, Meng,et al."Short-term stable isotopic composition variations of near-surface atmospheric water vapor in four semiarid areas (Binxian, Guyuan, Wujiachuan, Yuzhong) in interior northwestern China".ENVIRONMENTAL EARTH SCIENCES 75.18(2016).
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